A process for defining and controlling the track width for sensor devices is disclosed. The clutch includes a pin and U-shaped pin that compliments a configured groove section at the proximal end of a cutter that fits into a clutch mechanism in the drill or attachment. The power transformer and the LTC windings are placed in a main tank and the taps are placed in an LTC tank. The retainer has a top wall affixing to the upper face and a locking barb engaging with the mounting face. Accordingly, it becomes possible to refill and dispense a high viscosity oil easily. The device includes a tensioning structure for providing adjustable resistance.